Installing Trailer Wiring Connector on 2018 Subaru Impreza
Question:
Must you run the trailer lights all the way up to the battery or is hooking up to tail lights enough? Why must it be connected to car battery?
asked by: Chris
Expert Reply:
The T-One # 118744 installs on your 2018 Subaru Impreza by teeing into your vehicle wiring behind the turn signals. It receives power via the black wire that is routed to the battery on your Impreza. If you fail to connect the power wire then your trailer lights won't be able to draw enough power to function.
Some people also ask about connecting the power to a 12V source at the rear of the vehicle since a lot of newer vehicles have a 12V socket in the rear hatch area. While this seems like a good idea, the entire point of routing the power wire to the battery is so that the trailer wiring is completely separate from your expensive and intricate vehicle wiring. This way if something goes wrong with the trailer wiring your vehicle is protected. It's also worth noting that if you were to connect the power wire anywhere than at the battery, the extra draw of the trailer might exceed the max for that circuit.
I know it sounds like a pain but it's really the best thing for your vehicle. I have attached a helpful article on routing the power wire on a vehicle for you to reference.
Product Page this Question was Asked From
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Powered Converter
- Custom Fit
- 4 Flat
- Tekonsha
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Shop: T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: Trailer Hitch
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: Draw-Tite Max-Frame Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Article: Routing the Power Wire for a Trailer Wiring Harness
- Q&A: Best Trailer Hitch for 2018 Subaru Impreza
- Q&A: Trailer Hitch Recommendation for a 2016 Subaru Impreza Hatchback
- Shop: EcoHitch Hidden Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Video: Tekonsha T-One Vehicle Wiring Harness Installation - 2022 Subaru Impreza
- Shop: Curt Heavy Duty Forged Ball Mount for 2" Hitches - 1" Rise - 2" Drop - 17,000 lbs
- Video: Curt Custom Fit Vehicle Wiring - Trailer Hitch Wiring - C56367 Review
- Q&A: Hitch Recommendation and Wiring For 2020 Subaru Impreza to Tow Small Kayak Trailer
- Q&A: Trailer Hitch Recommendation for 2020 Subaru Impreza Wagon
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class II - 1-1/4"
- Shop: Stealth Hitches Hidden Rack Receiver - Custom Fit - 2"
- Article: RV Cell Boosters, How Do They Work?
- Q&A: Trailer Hitch Recommendation for 2018 Subaru Impreza Towing Trailer
- Q&A: What is the Most Hidden Hitch on a 2020 Subaru Impreza
- Video: EcoHitch Hidden Trailer Hitch Installation - 2022 Subaru Impreza
- Video: Curt Powered Tail Light Converter Installation - 2023 Kia Telluride
- Video: Tekonsha Custom Fit Vehicle Wiring - Trailer Hitch Wiring - 118744 Review
- Video: Best 2018 Subaru Impreza Trailer Wiring Options
- Video: Max-Frame Trailer Hitch Installation - 2018 Subaru Impreza - Draw-Tite
- Shop: Roof Rack
- Shop: Vehicle Air Mattress
- Q&A: Best Hidden Trailer Hitch for 2019 Subaru Impreza Sport 5 Door
- Shop: Off Road Lights
- Search Results: 44649
- Article: How to Choose the Right Trailer Hitch Class
on Custom Fit Vehicle Wiring
